1 /* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr> 7 * Copyright (C) 2014 Kevin Cernekee <cernekee@gmail.com> 8 */ 9 10 #include <linux/init.h> 11 #include <linux/bootmem.h> 12 #include <linux/clk-provider.h> 13 #include <linux/ioport.h> 14 #include <linux/of.h> 15 #include <linux/of_fdt.h> 16 #include <linux/of_platform.h> 17 #include <linux/smp.h> 18 #include <asm/addrspace.h> 19 #include <asm/bmips.h> 20 #include <asm/bootinfo.h> 21 #include <asm/prom.h> 22 #include <asm/smp-ops.h> 23 #include <asm/time.h> 24 25 void __init prom_init(void) 26 { 27 register_bmips_smp_ops(); 28 } 29 30 void __init prom_free_prom_memory(void) 31 { 32 } 33 34 const char *get_system_type(void) 35 { 36 return "Generic BMIPS kernel"; 37 } 38 39 void __init plat_time_init(void) 40 { 41 struct device_node *np; 42 u32 freq; 43 44 np = of_find_node_by_name(NULL, "cpus"); 45 if (!np) 46 panic("missing 'cpus' DT node"); 47 if (of_property_read_u32(np, "mips-hpt-frequency", &freq) < 0) 48 panic("missing 'mips-hpt-frequency' property"); 49 of_node_put(np); 50 51 mips_hpt_frequency = freq; 52 } 53 54 void __init plat_mem_setup(void) 55 { 56 void *dtb = __dtb_start; 57 58 set_io_port_base(0); 59 ioport_resource.start = 0; 60 ioport_resource.end = ~0; 61 62 /* intended to somewhat resemble ARM; see Documentation/arm/Booting */ 63 if (fw_arg0 == 0 && fw_arg1 == 0xffffffff) 64 dtb = phys_to_virt(fw_arg2); 65 66 __dt_setup_arch(dtb); 67 68 strlcpy(arcs_cmdline, boot_command_line, COMMAND_LINE_SIZE); 69 } 70 71 void __init device_tree_init(void) 72 { 73 struct device_node *np; 74 75 unflatten_and_copy_device_tree(); 76 77 /* Disable SMP boot unless both CPUs are listed in DT and !disabled */ 78 np = of_find_node_by_name(NULL, "cpus"); 79 if (np && of_get_available_child_count(np) <= 1) 80 bmips_smp_enabled = 0; 81 of_node_put(np); 82 } 83 84 int __init plat_of_setup(void) 85 { 86 return __dt_register_buses("brcm,bcm3384", "simple-bus"); 87 } 88 89 arch_initcall(plat_of_setup); 90 91 static int __init plat_dev_init(void) 92 { 93 of_clk_init(NULL); 94 return 0; 95 } 96 97 device_initcall(plat_dev_init); 98